C code examples for the Teensy 3.x boards Some bare metal projects inspired from dhwlch67's project and Karl Lunt's blog Right now there are two examples Blinky The on board LED blinks at a roughly 0.5 second interval UART The board prints "Hello, world!" over UART1 (pins 0 and 1 for Teensy 3.2) from the schematic here Serial doesn't work over the USB port so get one of these cables, they're useful for other projects involving UART as well.